VirTool Win32 Defender
Written by Wilbur Woodham

The VirTool:Win32/DefenderTamperingRestore detection means that your computer has a problem. Allowing it to run may end up with some really bad consequences.

The VirTool: Win32/DefenderTamperingRestore detection is used by Microsoft Defender Antivirus< to identify suboptimal configurations that may prevent it from functioning properly. When this detection is triggered, it will automatically reset its settings to more secure configurations.

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When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
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VirTool:Win32/DefenderTamperingRestore Detection Overview

VirTool:Win32/DefenderTamperingRestore is a detection name used by Microsoft Defender Antivirus to identify malicious software. This detection typically indicates the presence of a tool or program that attempts to tamper with or restore Microsoft Defender Antivirus settings or files.

VirTool:Win32/DefenderTamperingRestore detection

Microsoft Defender: “VirTool:Win32/DefenderTamperingRestore”

In simple terms, VirTool:Win32/DefenderTamperingRestore is a warning that some app on your system is trying to modify or interfere with the settings, files, or components of Microsoft Defender. Programs associated with this detection may seek to make unauthorized changes to your antivirus software. Thus, they could disable or circumvent its protective features.

So, if you see this detection, scan your computer for malware and check your Defender settings to ensure they’re correct. However, if you still have detections, contact Microsoft support for help.

Threat Summary:

Name DefenderTamperingRestore VirTool
Detection VirTool:Win32/DefenderTamperingRestore
Details DefenderTamperingRestore is attached to another program (such as a document), which can replicate and spread after initial execution.
Fix Tool See If Your System Has Been Affected by DefenderTamperingRestore VirTool

Is It dangerous?

If you see a DefenderTamperingRestore detection, it is crucial to take immediate action to investigate the cause and ensure that your computer is secure. DefenderTamperingRestore is essentially a script that can bypass or disable Microsoft Defender, making it a security risk as it enables malware to infect a computer without detection. Usually, malware triggers it, but it can also be caused by legitimate software or a user accidentally changing the Defender settings. Therefore, staying vigilant and taking the necessary steps to protect your computer from potential security threats is essential.

Remove DefenderTamperingRestore with Gridinsoft Anti-Malware

We have also been using this software on our systems ever since, and it has always been successful in detecting viruses. It has blocked the most common VirTools as shown from our tests with the software, and we assure you that it can remove DefenderTamperingRestore as well as other malware hiding on your computer.

Gridinsoft Anti-Malware - Main Screen

To use Gridinsoft for remove malicious threats, follow the steps below:

1. Begin by downloading Gridinsoft Anti-Malware, accessible via the blue button below or directly from the official website

2.Once the Gridinsoft setup file (setup-gridinsoft-fix.exe) is downloaded, execute it by clicking on the file.


3.Follow the installation setup wizard's instructions diligently.

Gridinsoft Setup Wizard

4. Access the "Scan Tab" on the application's start screen and launch a comprehensive "Full Scan" to examine your entire computer. This inclusive scan encompasses the memory, startup items, the registry, services, drivers, and all files, ensuring that it detects malware hidden in all possible locations.

Scan for DefenderTamperingRestore VirTools

Be patient, as the scan duration depends on the number of files and your computer's hardware capabilities. Use this time to relax or attend to other tasks.

5. Upon completion, Anti-Malware will present a detailed report containing all the detected malicious items and threats on your PC.

The DefenderTamperingRestore was Found

6. Select all the identified items from the report and confidently click the "Clean Now" button. This action will safely remove the malicious files from your computer, transferring them to the secure quarantine zone of the anti-malware program to prevent any further harmful actions.

The DefenderTamperingRestore has been removed

8. If prompted, restart your computer to finalize the full system scan procedure. This step is crucial to ensure thorough removal of any remaining threats. After the restart, Gridinsoft Anti-Malware will open and display a message confirming the completion of the scan.

Remember Gridinsoft offers a 6-day free trial. This means you can take advantage of the trial period at no cost to experience the full benefits of the software and prevent any future malware infections on your system. Embrace this opportunity to fortify your computer's security without any financial commitment.

Trojan Killer for “DefenderTamperingRestore” removal on locked PC

In situations where it becomes impossible to download antivirus applications directly onto the infected computer due to malware blocking access to websites, an alternative solution is to utilize the Trojan Killer application.

Trojan Killer - Main View

There is a really little number of security tools that are able to be set up on the USB drives, and antiviruses that can do so in most cases require to obtain quite an expensive license. For this instance, I can recommend you to use another solution of GridinSoft - Trojan Killer Portable. It has a 14-days cost-free trial mode that offers the entire features of the paid version. This term will definitely be 100% enough to wipe malware out.

Trojan Killer is a valuable tool in your cybersecurity arsenal, helping you to effectively remove malware from infected computers. Now, we will walk you through the process of using Trojan Killer from a USB flash drive to scan and remove malware on an infected PC. Remember, always obtain permission to scan and remove malware from a computer that you do not own.

Step 1: Download & Install Trojan Killer on a Clean Computer:

1. Go to the official GridinSoft website ( and download Trojan Killer to a computer that is not infected.

Download Trojan Killer

2. Insert a USB flash drive into this computer.

3. Install Trojan Killer to the "removable drive" following the on-screen instructions.

Install Trojan Killer to Removable Drive

4. Once the installation is complete, launch Trojan Killer.

Step 2: Update Signature Databases:

5. After launching Trojan Killer, ensure that your computer is connected to the Internet.

6. Click "Update" icon to download the latest signature databases, which will ensure the tool can detect the most recent threats.

Click Update Button

Step 3: Scan the Infected PC:

7. Safely eject the USB flash drive from the clean computer.

8. Boot the infected computer to the Safe Mode.

9. Insert the USB flash drive.

10. Run tk.exe

11. Once the program is open, click on "Full Scan" to begin the malware scanning process.

Searching DefenderTamperingRestore Virus

Step 4: Remove Found Threats:

12. After the scan is complete, Trojan Killer will display a list of detected threats.

Searching DefenderTamperingRestore Finished

13. Click on "Cure PC!" to remove the identified malware from the infected PC.

14. Follow any additional on-screen prompts to complete the removal process.

Restart needed

Step 5: Restart Your Computer:

15. Once the threats are removed, click on "Restart PC" to reboot your computer.

16. Remove the USB flash drive from the infected computer.

Congratulations on effectively removing DefenderTamperingRestore and the concealed threats from your computer! You can now have peace of mind, knowing that they won't resurface again. Thanks to Gridinsoft's capabilities and commitment to cybersecurity, your system is now protected.

How to Remove VirTool:Win32/DefenderTamperingRestore Malware

Name: VirTool:Win32/DefenderTamperingRestore

Description: VirTool:Win32/DefenderTamperingRestore is a malicious utility used by a full-fledged malware to disable Windows Defender. Such a step is needed to prevent any alarms from this anti-malware program, so malware will keep going without your knowledge. Seeing this detection should be a trigger for you to start actions for towards an urgent malware removal.

Operating System: Windows

Application Category: VirTool

User Review
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About the author

Wilbur Woodham

I was a technical writer from early in my career, and consider IT Security one of my foundational skills. I’m sharing my experience here, and I hope you find it useful.


  1. Avner Falk November 25, 2022
  2. Mith B June 27, 2023

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